Lightweight and wearable magnetoencephalography system based on spatially-grid constrained coils and compact magnetically shielded room

IF 4.7 2区 医学 Q1 NEUROIMAGING NeuroImage Pub Date : 2024-09-18 DOI:10.1016/j.neuroimage.2024.120842
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Abstract

Magnetoencephalography based on optically pumped magnetometers can passively detect the ultra-weak brain magnetic field signals, which has significant clinical application prospects for the diagnosis and treatment of cerebral disorders. This paper proposes a brain magnetic signal measurement method on the basis of the active–passive coupling magnetic shielding strategy and helmet-mounted detection array, which has lower cost and comparable performance over the existing ones. We first utilized the spatially-grid constrained coils and biplanar coils with proportion–integration–differentiation controller with tracking differentiator to ensure a near-zero and stable magnetic field environment with large uniform region. Subsequently, we implemented the brain magnetic signal measurement with the subject randomly moving fingers through tapping a keyboard and with the condition of opening and closing the eyes. Effectively induced brain magnetic signals were detected at the motor functional area and occipital lobe area in the two experiments, respectively. The proposed method will contribute to the development of functional brain imaging.
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基于空间栅格限制线圈和紧凑型磁屏蔽室的轻型可穿戴脑磁图系统。
基于光泵磁强计的脑磁图可以被动检测超弱脑磁场信号,在脑部疾病的诊断和治疗方面具有重要的临床应用前景。本文在主被动耦合磁屏蔽策略和头盔式探测阵列的基础上,提出了一种脑磁信号测量方法,与现有方法相比,成本更低,性能相当。我们首先利用空间栅格约束线圈和双平面线圈,以及带有跟踪微分器的比例积分微分控制器,确保大均匀区域的近零稳定磁场环境。随后,我们实现了脑磁信号测量,受试者通过敲击键盘随机移动手指,并在睁眼和闭眼的条件下进行脑磁信号测量。两次实验分别在运动功能区和枕叶区检测到了有效诱导的脑磁信号。所提出的方法将有助于脑功能成像的发展。
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来源期刊
NeuroImage
NeuroImage 医学-核医学
CiteScore
11.30
自引率
10.50%
发文量
809
审稿时长
63 days
期刊介绍: NeuroImage, a Journal of Brain Function provides a vehicle for communicating important advances in acquiring, analyzing, and modelling neuroimaging data and in applying these techniques to the study of structure-function and brain-behavior relationships. Though the emphasis is on the macroscopic level of human brain organization, meso-and microscopic neuroimaging across all species will be considered if informative for understanding the aforementioned relationships.
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